Assert Object Keys Are Valid

Introduction

In this lab, we will learn how to validate all the keys in an object and ensure they match a given set of keys. We will make use of the Object.keys() method to get the keys of the object and then use Array.prototype.every() and Array.prototype.includes() to validate each key. This lab will help you to write more efficient and error-free code when working with objects in JavaScript.

Validate Object Keys

To ensure that all keys in an object match the specified keys, follow these steps:

• Open the Terminal/SSH and type node to start practicing coding.
• Use Object.keys() to retrieve the keys of the object, obj.
• Use Array.prototype.every() and Array.prototype.includes() to validate that each key in the object is included in the keys array.

Here's an example implementation:

const validateObjectKeys = (obj, keys) =>
  Object.keys(obj).every((key) => keys.includes(key));

You can use the function like this:

validateObjectKeys({ id: 10, name: "apple" }, ["id", "name"]); // true
validateObjectKeys({ id: 10, name: "apple" }, ["id", "type"]); // false

Summary

Congratulations! You have completed the Assert Object Keys Are Valid lab. You can practice more labs in LabEx to improve your skills.